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State one appropriate observation for ea...

State one appropriate observation for each of the following:
Copper sulphide is treated with dilute hydrochloric acid.

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State one appropriate observation for : (i) Copper sulphide is tread with dilute hydrochloric acid . (ii) A few drops fo dil HCl are added to AgNO_(3) soln , followed by addition of NH_(4)OH soln.

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  18. Identify the acid which matches the following description : The ele...

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